材料科学
纳米棒
光电流
异质结
光电子学
氧化锡
钒酸铋
基质(水族馆)
化学工程
纳米技术
钨酸盐
载流子
兴奋剂
光催化
海洋学
地质学
工程类
催化作用
化学
冶金
生物化学
作者
Bo Reum Lee,Mi Gyoung Lee,Hoonkee Park,Tae Hyung Lee,Sol A Lee,Swetha S. M. Bhat,Chang−Yeon Kim,Sanghan Lee,Ho Won Jang
标识
DOI:10.1021/acsami.9b03712
摘要
Tungsten oxide (WO3) and bismuth vanadate (BiVO4) are one of the most attractive combinations to construct an efficient heterojunction for photoelectrochemical (PEC) applications. Here, we report an all-solution-processed WO3/BiVO4 heteronanostructure photoanode with highly enhanced photoactivity and stability for sustainable energy production. The vertically aligned WO3 nanorods were synthesized on a fluorine-doped tin oxide/glass substrate by the hydrothermal method without a seed layer and BiVO4 was deposited by pulsed electrodeposition for conformal coating. Owing to the long diffusion lengths of charge carriers in the WO3 nanorods, the ability to absorb the wider range of wavelengths, and appropriate band-edge positions of the WO3/BiVO4 heterojunction for spontaneous PEC reaction, the optimum WO3/BiVO4 photoanode has a photocurrent density of 4.15 mA/cm2 at 1.23 V versus RHE and an incident-photon-to-current efficiency of 75.9% at 430 nm under front illumination, which are a double and quadruple those of pristine WO3 nanorod arrays, respectively. Our work suggests an environment-friendly and low-cost all-solution process route to synthesize high-quality photoelectrodes.
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